JVC HR-XV1EU-R Service Manual
SERVICE MANUAL
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HR-XV1EU-R
DIGITAL VIDEO
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This service manual is printed on 100% recycled paper.
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD
HR-XV1EU-R V14PV1
No.82947
November 2002
TABLE OF CONTENTS
Section Title Page Section Title Page
Important Safety Precautions
INSTRUCTIONS
DISASSEMBLY INSTRUCTIONS
1.
REMOVAL OF MECHANICAL PARTS AND P.C.BOARDS ...............
1-1 TOP CABINET AND FRONT CABINET............................ 1-1
1-2 FLAP ..................................................................................1-1
1-3 DECK CD AND DVD PCB .................................................1-1
1-4 POWER PCB .....................................................................1-2
1-5 VCR DECK ........................................................................ 1-2
1-6 VCR PCB ...........................................................................1-2
2. REMOVAL OF VCR DECK PARTS.........................................1-3
2-1 TOP BRACKET..................................................................1-3
2-2 CASSETTE HOLDER ASS’Y.............................................1-3
2-3 CASSETTE SIDE L/R ........................................................1-3
2-4 LINK UNIT .........................................................................1-3
2-5 LINK LEVER / FLAP LEVER ............................................. 1-3
2-6 LOADING MOTOR / WORM..............................................1-4
2-7 TENSION ASS’Y................................................................1-4
2-8 T BRAKE ARM / T BRAKE BAND......................................1-5
S REEL / T REEL / IDLER ARM ASS’Y / IDLER GEAR ..............
2-9
CASSETTE OPENER / PINCH ROLLER BLOCK / P5 ARM ASS’Y.............
2-10
2-11 A/C HEAD ........................................................................ 1-6
2-12 FE HEAD ......................................................................... 1-6
2-13 CYLINDER UNIT ASS’Y ..................................................1-6
2-14 CAPSTAN DD UNIT.........................................................1-7
2-15
MAIN CAM / PINCH ROLLER CAM / JOINT GEAR ............
2-16 LOADING GEAR S/T UNIT..............................................1-7
CLUTCH ASS’Y / RING SPRING / CLUTCH LEVER / CLUTCH GEAR ...............
2-17
CASSETTE GUIDE POST / INCLINED BASE S/T UNIT / P4 CAP..............
2-18
3.
REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ...........
REMOVAL................................................................................1-9
INSTALLATION ......................................................................1-10
KEY TO ABBREVIATIONS ...................................................... 1-11
SERVICE MODE LIST.............................................................. 1-13
WHEN “N” IS ALWAYS BEING DISPLAYED ON THE TV MONITOR .............
PARENTAL CONTROL - RATING LEVEL 4-DIGIT SECURITY CODE CANNCELLATION ................
WHEN REPLACING EEPROM(MEMORY) IC .........................1-14
PREVENTIVE CHECKS AND SERVICE INTERVALS............. 1-15
CONFIRMATION OF HOURS USED .......................................1-15
CLEANING ............................................................................... 1-15
SERVICING FIXTURES AND TOOLS...................................... 1-16
MECHANISM ADJUSTMENT PARTS LOCATION GUIDE............
MECHANICAL ADJUSTMENT ................................................1-17
TAPE REMOVAL METHOD AT NO POWER SUPPLY .......... 1-17
DISC REMOVAL METHOD AT NO POWER SUPPLY...........1-17
1. CONFIRMATION AND ADJUSTMENT ................................. 1-17
CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION ..............
1-1
1-2 CONFIRMATION OF PLAYBACK TORQUE AND
BACK TENSION TORQUE DURING PLAYBACK...........1-17
1-3 CONFIRMATION OF VSR TORQUE...............................1-17
1-4 CONFIRMATION OF REEL BRAKE TORQUE................1-18
2. CONFIRMATION AND ADJUSTMENT OF TAPE
RUNNING MECHANISM ..................................................1-18
2-1 GUIDE ROLLER ..............................................................1-18
CONFIRMATION AND ADJUSTMENT OF AUDIO/CONTROL HEAD ................
2-2
2-3
TAPE RUNNING ADJUSTMENT(X-V ALUE ADJUSTMENT) .................
ELECTRICAL ADJUSTMENTS ...............................................1-20
1. BASIC ADJUSMENT ............................................................ 1-20
1-1 SWITCHING POINT ........................................................ 1-20
ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE ............
IC DESCRIPTIONS ..................................................................1-21
SERVO TIMING CHART .......................................................... 1-32
MECHANISM TIMING CHART.................................................1-33
TROUBLE SHOOTING GUIDE ................................................1-34
(VCR SECTION) ....................................................................1-34
(DVD SECTION) ....................................................................1-57
AUDIO/VIDEO SCHEMATIC DIAGRAM ...............................2-13
SYSCON1 SCHEMATIC DIAGRAM ......................................2-15
1-1
Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM ................. 2-17
VCR SYSCON SCHEMATIC DIAGRAM ............................... 2-19
TUNER\/JACK SCHEMATIC DIAGRAM ...............................2-21
REGULATOR SCHEMATIC DIAGRAM................................. 2-23
DISPLAY SCHEMATIC DIARAM........................................... 2-25
HI-FI/DEMODULATOR SCHEMATIC DIAGRAM ..................2-27
DVD IN/OUT SCHEMATIC DIAGRAM .................................. 2-29
SUB MICOM/OSD/VPS SCHEMATIC DIAGRAM ................. 2-31
OPERATION SCHEMATIC DIAGRAM ..................................2-33
PRINTED CIRCUIT BOARDS VCR(INSERTED PARTS) ................
PRINTED CIRCUIT BOARDS VCR(CHIP MOUNTED PARTS) ..............
PRINTED CIRCUIT BOARDS DVD .......................................2-39
PRINTED CIRCUIT BOARDS POWER / OPERATION............
WAVEFORMS .......................................................................2-42
DVD BLOCK DIAGRAM ........................................................2-45
Y/C/AUDIO/HEAD AMP BLOCK DIAGRAM ..........................2-47
1-5
MICOM BLOCK DIAGRAM.................................................... 2-49
1-6
REGULATOR BLOCK DIAGRAM.......................................... 2-51
DISPLAY/OPERATION BLOCK DIAGRAM........................... 2-53
TUNER/JACK/HI-FI/21PIN/OSD BLOCK DIAGRAM............. 2-55
DVD IN/OUT BLOCK DIAGRAM ........................................... 2-57
POWER BLOCK DIAGRAM ..................................................2-59
1-7
1-8
PARTS LIST
1-8
3.1 PACKING AND ACCESSORY ASSEMBLY<M1> ................ 3-1
1-9
3.2 FINAL ASSEMBLY<M2>...................................................... 3-2
3.3 MECHANISM ASSEMBLY<M4> .......................................... 3-4
3.4 ELECTRICAL PARTS LIST.................................................. 3-7
POWER BOARD ASSEMBLY<01>.......................................... 3-7
VCR BOARD ASSEMBLY<03>.................................................3-7
1-13
OPERATION BOARD ASSEMBLY<28> .................................3-13
1-13
DVD BOARD ASSEMBLY<50>...............................................3-13
REFERENCE
GENERAL SPECIFICATIONS [HR-XV1EU-R] ........................ 4-1
1-16
1-17
1-19
1-19
1-20
2-35
2-37
2-41
CHARTS AND DIAGRAMS
INTERCONNECTION DIAGRAM ............................................ 2-1
POWER SCHEMATIC DIAGRAM ...........................................2-3
READ CHANNEL SCHEMTAIC DIAGRAM .............................2-5
DSP SCHEMATIC DIAGRAM.................................................. 2-7
MPEG SCHEMATIC DIAGRAM ..............................................2-9
MEMORY SCHEMATIC DIAGRAM .......................................2-11
Important Safety Precautions
cut close to connector
Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes
of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the
following precautions when a set is being serviced.
v
Precautions during Servicing
1. Locations requiring special caution are denoted by labels and
inscriptions on the cabinet, chassis and certain parts of the
product. When performing service, be sure to read and comply with these and other cautionary notices appearing in the
operation and service manuals.
2. Parts identified by the symbol and shaded ( ) parts are
critical for safety.
Replace only with specified part numbers.
Note: Parts in this category also include those specified to com-
ply with X-ray emission standards for products using
cathode ray tubes and those specified for compliance
with various regulations regarding spurious radiation
emission.
3. Fuse replacement caution notice.
Caution for continued protection against fire hazard.
Replace only with same type and rated fuse(s) as specified.
4. Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
5. Use specified insulating materials for hazardous live parts.
Note especially:
1) Insulation Tape 3) Spacers 5) Barrier
2) PVC tubing 4) Insulation sheets for transistors
6. When replacing AC primary side components (transformers,
power cords, noise blocking capacitors, etc.) wrap ends of
wires securely about the terminals before soldering.
12. Crimp type wire connector
In such cases as when replacing the power transformer in sets
where the connections between the power cord and power
transformer primary lead wires are performed using crimp type
connectors, if replacing the connectors is unavoidable, in order to prevent safety hazards, perform carefully and precisely
according to the following steps.
1) Connector part number : E03830-001
2) Required tool : Connector crimping tool of the proper type
which will not damage insulated parts.
3) Replacement procedure
(1) Remove the old connector by cutting the wires at a point
close to the connector.
Important : Do not reuse a connector (discard it).
Fig.3
(2) Strip about 15 mm of the insulation from the ends of
the wires. If the wires are stranded, twist the strands to
avoid frayed conductors.
15 mm
Fig.1
7. Observe that wires do not contact heat producing parts
(heatsinks, oxide metal film resistors, fusible resistors, etc.)
8. Check that replaced wires do not contact sharp edged or
pointed parts.
9. When a power cord has been replaced, check that 10-15 kg of
force in any direction will not loosen it.
Power cord
Fig.2
10. Also check areas surrounding repaired locations.
11. Products using cathode ray tubes (CRTs)
In regard to such products, the cathode ray tubes themselves,
the high voltage circuits, and related circuits are specified for
compliance with recognized codes pertaining to X-ray emission.
Consequently, when servicing these products, replace the cathode ray tubes and other parts with only the specified parts.
Under no circumstances attempt to modify these circuits.
Unauthorized modification can increase the high voltage value
and cause X-ray emission from the cathode ray tube.
Fig.4
(3) Align the lengths of the wires to be connected. Insert
the wires fully into the connector.
Metal sleeve
Connector
Fig.5
(4) As shown in Fig.6, use the crimping tool to crimp the
metal sleeve at the center position. Be sure to crimp fully
to the complete closure of the tool.
1.25
2.0
5.5
Fig.6
(5) Check the four points noted in Fig.7.
Not easily pulled free
Wire insulation recessed
more than 4 mm
Fig.7
Crimping tool
Crimped at approx. center
of metal sleeve
Conductors extended
1
S40888-01
v
d'
d
Chassis
Power cord,
primary wire
Region
USA & Canada
Europe & Australia
Grounding Impedance (Z)
Z 0.1 ohm
Z 0.5 ohm
≤
≤
AC inlet
Earth pin
Exposed accessible part
Milli ohm meter
Grounding Specifications
ab
c
V
Externally
exposed
accessible part
Z
Safety Check after Servicing
Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been
returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards.
1. Insulation resistance test
Confirm the specified insulation resistance or greater between power cord plug prongs and
externally exposed parts of the set (RF terminals, antenna terminals, video and audio input
and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
2. Dielectric strength test
Confirm specified dielectric strength or greater between power cord plug prongs and exposed
accessible parts of the set (RF terminals, antenna terminals, video and audio input and output
terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
3. Clearance distance
When replacing primary circuit components, confirm specified clearance distance (d), (d’) between soldered terminals, and between terminals and surrounding metallic parts. See table 1
below.
Fig. 8
4. Leakage current test
Confirm specified or lower leakage current between earth ground/power cord plug prongs
and externally exposed accessible parts (RF terminals, antenna terminals, video and audio
input and output terminals, microphone jacks, earphone jacks, etc.).
Measuring Method : (Power ON)
Insert load Z between earth ground/power cord plug prongs and externally exposed accessible parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and
following table 2.
Fig. 9
5. Grounding (Class 1 model only)
Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in,
Video out, Audio in, Audio out or Fixing screw etc.).
Measuring Method:
Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.
Fig. 10
AC Line Voltage
100 V
100 to 240 V
110 to 130 V
110 to 130 V
200 to 240 V
Region
Japan
USA & Canada
Europe & Australia R 10 MΩ/500 V DC
Region Load Z
Insulation Resistance (R)
≤
R 1 MΩ/500 V DC
≥≥
1 MΩ R 12 MΩ/500 V DC
≤
Table 1 Specifications for each region
Dielectric Strength
AC 1 kV 1 minute
AC 1.5 kV 1 miute
AC 1 kV 1 minute
AC 3 kV 1 minute
AC 1.5 kV 1 minute
(Class 2)
(Class 1)
Clearance Distance (d), (d')
≤
d, d' 3 mm
≤
d, d' 4 mm
≤
d, d' 3.2 mm
≤
d 4 mm
≤
d' 8 mm (Power cord)
≤
d' 6 mm (Primary wire)
a, b, cLeakage Current (i)AC Line Voltage
100 V
110 to 130 V
110 to 130 V
220 to 240 V
Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
Japan
USA & Canada
Europe & Australia
Table 2 Leakage current specifications for each region
1 kΩ
0.15 µF
1.5 kΩ
2 kΩ
50 kΩ
2
≤
i 1 mA rms Exposed accessible parts
≤
i 0.5 mA rms
≤
i 0.7 mA peak
≤
i 2 mA dc
≤
i 0.7 mA peak
≤
i 2 mA dc
Exposed accessible parts
Antenna earth terminals
Other terminals
S40888-01
DISASSEMBLY INSTRUCTIONS
1.
REMOVAL OF MECHANICAL PARTS
AND P.C. BOARDS
1-1:
TOP CABINET AND FRONT CABINET
(Refer to Fig. 2-1)
1.
Remove the 5 screws 1.
2.
Remove the Top Cabinet in the direction of arrow (A).
3.
Disconnect the following connector: (CP681).
4.
Unlock the 8 supports 2.
5.
Remove the Front Cabinet in the direction of arrow (B).
6.
Remove the 3 screws 3.
7.
Remove the Operation PCB in the direction of arrow (C).
Top Cabinet
1
(A)
Front Cabinet
(B)
2
2
2
2
3
3
2
2
2
3
(C)
CP681
2
1-2: FLAP (Refer to Fig. 1-2)
1.2.Open Flap to 90˚ and flex in direction of arrow (A), at the
same time slide in direction of arrow (B).
Then lift in direction of arrow (C).
1
1
1
1
Operation PCB
Fig. 1-1
1-3: DECK CD AND DVD PCB (Refer to Fig. 1-3)
1.
Make the short circuit on the position as shown Fig. 1-3
using a soldering. If you remove the Deck CD with no
soldering, the Laser may be damaged.
2.
Disconnect the following connectors: (CP503,CP8001
and CP8002).
3.
Remove the 4 screws 1.
4.
Remove the Deck Angle in the direction of arrow (A).
5.
Remove the 2 screws 2.
6.
Remove the Front-DVD Shield in the direction of arrow
(B).
7.
Remove the 4 screws 3.
8.
Disconnect the following connectors: (CP2601, CP2602
and CP2603).
9.
Remove the Deck CD in the direction of arrow (C).
10.
Remove the 4 screws 4.
11.
Remove the DVD PCB in the direction of arrow (D).
Pick Up PCB
3
3
(C)
4
3
3
Deck Angle
1
1
4
CP2602
Make the sort circuit
using a soldering.
DVD PCB
Deck CD
Front-DVD Shield
2
2
(B)
CP2603
1
CP2601
4
1
(D)
4
(C)
(B)
(A)
Flap
Fig. 1-2
CP8001
(A)
CP503
CP8002
Fig. 1-3
NOTE
When the installation of the Deck CD, remove all the soldering on the short circuit position after the connection of Pick
Up PCB and DVD PCB connector.
1-1
DISASSEMBLY INSTRUCTIONS
1-4: POWER PCB (Refer to Fig. 1-4)
1.
Disconnect the following connector: (CP1701).
2.
Remove the 3 screws 1.
3.
Remove the Power PCB in the direction of arrow.
1
1
CP1701
1
Power PCB
Bottom Plate
1-5: VCR DECK (Refer to Fig. 1-5)
1.
Unlock the 2 supports 1 and remove the Top Holder.
2.
Remove the 3 screws 2.
3.
Disconnect the following connectors: (CP101, CP102,
CP103 and CP3001).
4.
Remove the AC Head Cover and VCR Deck in the
direction of arrow.
Fig. 1-4
1-6: VCR PCB (Refer to Fig. 1-6)
1.
Remove the screw 1 and Fiber Washer.
2.
Remove the 6 screws 2.
3.
Remove the VCR PCB in the direction of arrow.
2
Fiber Washer
VCR PCB
1
2
2
2
2
2
Fig. 1-6
VCR Deck
CP3001
CP103
2
2
2
AC Head Cover
Top Holder
1
1
CP101
CP102
Fig. 1-5
1-2
DISASSEMBLY INSTRUCTIONS
2. REMOVAL OF VCR DECK PARTS
2-1: TOP BRACKET (Refer to Fig. 2-1)
Extend the 2 supports 1.
1.
Slide the 2 supports 2 and remove the Top Bracket.
2.
NOTE
After the installation of the Top Bracket, bend the support
1.
1 so that the Top Bracket is fixed.
Top Bracket
1
Top Bracket
2
Main Chassis
2
Main Chassis
2-2: CASSETTE HOLDER ASS'Y (Refer to Fig. 2-2)
1.
Move the Cassette Holder Ass'y to the front side.
2.
Push the Locker R to remove the Cassette Side R.
3.
Remove the Cassette Side L.
Cassette Side R
Main Chassis
1
Locker R
Fig. 2-1
NOTE
In case of the Locker R installation, check if the one
1.
position of Fig. 2-3-B are correctly locked.
When you install the Cassette Side R, be sure to move
2.
the Locker R after installing.
Locker R
Check if this position
Cassette Side R
is locked.
Fig. 2-3-B
2-4: LINK UNIT (Refer to Fig. 2-4)
1.
Set the Link Unit to the Eject position.
2.
Unlock the support 1.
3.
Remove the (A) side of the Link Unit first, then remove
the (B) side.
Main Chassis
Link Unit
Link Unit
Cassette Side L
Main Chassis
2-3: CASSETTE SIDE L/R (Refer to Fig. 2-3-A)
1.
Remove the Locker Spring.
2.
Unlock the 4 supports 1 and then remove the Cassette
Side L/R.
3.
Unlock the support 2 and then remove the Locker R.
Locker Spring
1
1
2
Cassette Side R
Cassette Holder
Locker R
1
1
Cassette Side L
Fig. 2-2
(A)
(B)
Link Unit
Main Chassis
2-5: LINK LEVER/FLAP LEVER (Refer to Fig. 2-5)
1.
Extend the support 1.
2.
Remove the Link Lever.
3.
Remove the Flap Lever.
1
Flap Lever
Link Lever
Fig. 2-4
Fig. 2-5
Fig. 2-3-A
1-3
DISASSEMBLY INSTRUCTIONS
2-6: LOADING MOTOR/WORM (Refer to Fig. 2-6-A)
1.
Remove the screw 1.
2.
Remove the Loading Motor.
3.
Remove the Worm.
Loading Motor
Worm
Main Chassis
• Screw Torque: 3 ± 0.5kgf•cm
1
Fig. 2-6-A
NOTE
1.
In case of the Worm installation, check if the value of the
Fig. 2-6-B is correct.
2.
In case of the Loading Motor installation, hook the wire on
the Cassette Opener as shown Fig. 2-6-C.
3.
When installing the wires between Capstan DD Unit and
Loading Motor, connect them correctly as shown Fig. 2-6-D.
19.2 ± 0.1mm
2-7: TENSION ASS’Y (Refer to Fig. 2-7-B)
1.
Turn the Pinch Roller Cam clockwise so that the Tension
Holder hook is set to the position of Fig. 2-7-A to move
the Tension Arm Ass’y.
2.
Remove the Tension Spring.
3.
Unlock the 2 supports 1 and remove the Tension Band.
4.
Unlock the support 2 and remove the Tension Arm Ass’y.
5.
Unlock the support 3 and remove the Tension Connect.
6.
Float the hook 4 and turn it clockwise then remove the
Tension Holder.
Tension Arm Ass’y
Fig. 2-7-A
1
Tension Connect
Tension Spring
2
4
1
3
Tension Holder
Tension Band
Tension Arm Ass’y
Loading Motor
-
+
Safety surface for pressing
of the insert.
Pink
White
Fig. 2-6-B
Loading Motor
Cassette Opener
Fig. 2-6-C
Capstan DD Unit
L2
L1
Fig. 2-6-D
Fig. 2-7-B
NOTE
1.
In case of the Tension Band installation, note the direction of the installation. (Refer to Fig. 2-7-C)
2.
In case of the Tension Band installation, install correctly
as Fig. 2-7-D.
3.
In case of the Tension Connect installation, install as the
circled section of Fig. 2-7-E.
Tension Connect
Tension Band
Fig. 2-7-C
1-4
[OK]
[NG]
Tension Connect
Tension Connect
Tension Connect
DISASSEMBLY INSTRUCTIONS
NOTE
1.
Take care not to damage the gears of the S Reel and T
Tension Band
Tension Band
Fig. 2-7-D
Reel.
2.
The Polyslider Washer may be remained on the back of
the reel.
3.
Take care not to damage the shaft.
4.
Do not touch the section “A” of S Reel and T Reel. (Use
gloves.) (Refer to Fig. 2-9-A) Do not adhere the stains
on it.
5.
When you install the reel, clean the shaft and grease it
(FG-84M). (If you do not grease, noise may be heard in
FF/REW mode.)
6.
After installing the reel, adjust the height of the reel.
(Refer to MECHANICAL ADJUSTMENT)
Main Chassis
Fig. 2-7-E
2-8: T BRAKE ARM/T BRAKE BAND (Refer to Fig. 2-8-A)
Remove the T Brake Spring.
1.
Turn the T Brake Arm clockwise and bend the hook
2.
section to remove it.
Unlock the 2 supports 1 and remove the T Brake Band.
3.
T Brake Band
Hook section
1
1
T Brake Arm
T Brake Spring
Fig. 2-8-A
NOTE
1. In case of the T Brake Band installation, install correctly
as Fig. 2-8-B.
Idler Gear
Idler Arm Ass’y
S Reel
(A)
(B)
T Reel
1
(A)
1
Fig. 2-9-A
NOTE
1.2.In case of the S Reel and T Reel installation, check if the
correct parts are installed. (Refer to Fig. 2-9-B)
In case of the Idler Arm Ass’y installation, install correctly
as Fig. 2-9-C. And also set it so that the section “B” of
Fig. 2-9-A is placed under the Main Chassis tab.
[OK]
T Brake Band
[NG]
T Brake Band
T Brake Arm
T Brake Arm
Fig. 2-8-B
2-9: S REEL/T REEL/IDLER ARM ASS’Y/IDLER GEAR
(Refer to Fig. 2-9-A)
1.
Remove the S Reel and T Reel.
2.
Remove the 2 Polyslider Washers 1.
3.
Remove the Idler Arm Ass’y and Idler Gear.
[OK]
[NG]
Clutch Gear
Clutch Gear
Big Hole
(S Reel)
Small Hole
(T Reel)
Fig. 2-9-B
Idler Arm Ass’y
Idler Arm Ass’y
Fig. 2-9-C
1-5
DISASSEMBLY INSTRUCTIONS
2-10: CASSETTE OPENER/PINCH ROLLER BLOCK/P5
ARM ASS’Y (Refer to Fig. 2-10-A)
1.2.Unlock the support 1 and remove the Cassette Opener.
Remove the Pinch Roller Block and P5 Arm Ass’y.
1
Cassette Opener
Pinch Roller Block
P5 Arm Ass’y
Main Chassis
Fig. 2-10-A
NOTE
1.2.Do not touch the Pinch Roller. (Use gloves.)
In case of the Pinch Roller Block and the Pinch Roller
Cam installation, install correctly as Fig. 2-10-B.
Pinch Roller Block
P5 Arm Ass’y
Can be seen the hole of the
Main Cam.
Can be seen the hole of
the Pinch Roller Cam.
Fig. 2-10-B
2-11: A/C HEAD (Refer to Fig. 2-11-A)
1.
Remove the screw 1.
2.
Remove the A/C Head Base.
3.
Remove the 3 screws 2.
4.
Remove the A/C Head and A/C Head Spring.
NOTE
1.
Do not touch the A/C Head. (Use gloves.)
2.
When you install the A/C Head Spring, install as shown in
Fig. 2-11-B.
3.
When you install the A/C Head, tighten the screw (1) first,
then tighten the screw (2), finally tighten the screw (3).
(3)
(1)
2
2
(2)
2
A/C Head
Spring Position
Fig. 2-11-B
2-12: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-12)
1.2.Remove the screw 1.
Remove the FE Head.
1
FE Head
• Screw Torque: 5 ± 0.5kgf•cm
• The FE Head is not installed on the Video Cassette Player.
Fig. 2-12
2-13: CYLINDER UNIT ASS’Y (Refer to Fig. 2-13)
1.
Disconnect the following connector:
(CD2001)
2.
Remove the 3 screws 1.
3.
Remove the Cylinder Unit Ass’y.
NOTE
1. When you install the Cylinder Unit Ass’y, tighten the
screws from (1) to (3) in order while pulling the Ass’y
toward the left front direction.
CD2001
Cylinder Unit Ass’y
• Screw Torque: 5 ± 0.5kgf•cm (Screw 1)
1-6
A/C Head Spring
1
A/C Head Base
• Screw Torque: 3 ± 0.5kgf•cm
(2)
(1)
1
(3)
1
1
Fig. 2-13
Fig. 2-11-A
DISASSEMBLY INSTRUCTIONS
2-14: CAPSTAN DD UNIT (Refer to Fig. 2-14-A)
1.
Remove the Capstan Belt.
2.
Remove the 3 screws 1.
3.
Remove the Capstan DD Unit.
Capstan Belt
Capstan DD Unit
1
1
1
• Screw Torque: 4 ± 0.5kgf•cm
Fig. 2-14-A
NOTE
1. In case of the Capstan DD Unit installation, apply the
silicon bond (TSE3843-W) on the position Fig. 2-14-B
correctly. (If no silicon bond applied, abnormal noise will
be heard on the deck operation.)
(Refer to Fig. 2-14-B, C)
Applied position of
silicon bond
2-15: MAIN CAM/PINCH ROLLER CAM/JOINT GEAR
(Refer to Fig. 2-15-A)
1.2.Remove the E-Ring 1, then remove the Main Cam.
Remove the E-Ring 2, then remove the Pinch Roller
Cam and Joint Gear.
1
Main Cam
2
Pinch Roller Cam
Joint Gear
Fig. 2-15-A
NOTE
1. In case of the Pinch Roller Cam and Main Cam installation, install them as the circled section of Fig. 2-15-B so
that the each markers are met. (Refer to Fig. 2-15-B)
And also can be seen the Main Chassis hole through the
Main Cam maker hole.
Pinch Roller Cam
Marker
Main Cam
Be careful not to apply the silicon
bond to the Pinch Roller.
Capstan DD Unit
Silicon Bond
Main Chassis
Fig. 2-14-B
Fig. 2-14-C
Fig. 2-15-B
2-16: LOADING GEAR S/T UNIT (Refer to Fig. 2-16-A)
1.2.Remove the E-Ring 1 and remove the Main Loading
Gear.
Remove the Main Rod, Tension Lever, Loading Arm S
Unit and Loading Arm T Unit.
1
Main Rod
Tension Lever
Main Loading Gear
Loading Arm T Unit
Loading Arm S Unit
Fig. 2-16-A
1-7
DISASSEMBLY INSTRUCTIONS
NOTE
1. When you install the Loading Arm S Unit, Loading Arm T
Unit and Main Loading Gear, align each marker. (Refer to
Fig. 2-16-B)
Marker
Main Loading Gear
Marker
Loading Arm T Unit Loading Arm S Unit
Fig. 2-16-B
2-17: CLUTCH ASS’Y/RING SPRING/CLUTCH LEVER/
CLUTCH GEAR (Refer to Fig. 2-17-A)
1.
Remove the Polyslider Washer 1.
2.
Remove the Clutch Ass’y and Ring Spring.
3.
Remove the Clutch Lever.
4.
Remove the Coupling Gear, Coupling Spring and Clutch
Gear.
1
Clutch Ass’y
Ring Spring
2-18: CASSETTE GUIDE POST/INCLINED BASE S/T
UNIT/P4 CAP (Refer to Fig. 2-18-A)
1.
Remove the P4 Cap.
2.
Unlock the support 1 and remove the Cassette Guide
Post.
3.
Remove the Inclined Base S Unit and Inclined Base T
Unit.
Cassette Guide Post
Inclined Base T
Unit
P4 Cap
Inclined Base S
Unit
1
Fig. 2-18-A
NOTE
1.
Do not touch the roller of Guide Roller.
2.
In case of the P4 Cap installation, install it with parallel
for “A” and “B” of Fig. 2-18-B.
3.
In case of the Cassette Guide Post installation, install
correctly as the circled section of Fig. 2-18-C.
Coupling Gear
Coupling Spring
Clutch Gear
Clutch Lever
Fig. 2-17-A
NOTE
1. In case of the Clutch Ass’y installation, install it with
inserting the spring of the Clutch Ass’y into the dent of the
Coupling Gear. (Refer to Fig. 2-17-B)
Clutch Ass’y
Coupling Gear
Fig. 2-17-B
“A”
P4 Cap
[OK]
Cassette Guide Post
[NG]
Cassette Guide Post
“B”
Cassette Opener
Fig. 2-18-B
Fig. 2-18-C
1-8
DISASSEMBLY INSTRUCTIONS
3. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC
REMOVAL
1. Put the Masking Tape (cotton tape) around the Flat
Package IC to protect other parts from any damage.
(Refer to Fig. 3-1.)
NOTE
Masking is carried out on all the parts located within
10 mm distance from IC leads.
Masking Tape
(Cotton Tape)
2. Heat the IC leads using a blower type IC desoldering
machine. (Refer to Fig. 3-2.)
NOTE
Do not add the rotating and the back and forth directions force on the IC, until IC can move back and forth
easily after desoldering the IC leads completely.
IC
Fig. 3-1
Blower type IC
desoldering machine
3. When IC starts moving back and forth easily after
desoldering completely, pickup the corner of the IC using
a tweezers and remove the IC by moving with the IC
desoldering machine. (Refer to Fig. 3-3.)
NOTE
Some ICs on the PCB are affixed with glue, so be
careful not to break or damage the foil of each IC
leads or solder lands under the IC when removing it.
Blower type IC
desoldering machine
Tweezers
IC
4.5.Peel off the Masking Tape.
Absorb the solder left on the pattern using the Braided
Shield Wire. (Refer to Fig. 3-4.)
NOTE
Do not move the Braided Shield Wire in the vertical
direction towards the IC pattern.
Fig. 3-3
Braided Shield Wire
Soldering Iron
IC
Fig. 3-2
IC pattern
Fig. 3-4
1-9
DISASSEMBLY INSTRUCTIONS
INSTALLATION
1. Take care of the polarity of new IC and then install the
new IC fitting on the printed circuit pattern. Then solder
each lead on the diagonal positions of IC temporarily.
(Refer to Fig. 3-5.)
Soldering Iron
Solder temporarily
Solder temporarily
Fig. 3-5
2. Supply the solder from the upper position of IC leads
sliding to the lower position of the IC leads.
(Refer to Fig. 3-6.)
4. When bridge-soldering between terminals and/or the
soldering amount are not enough, resolder using a Thintip Soldering Iron. (Refer to Fig. 3-8.)
IC
Thin-tip Soldering Iron
Fig. 3-8
5. Finally, confirm the soldering status on four sides of the
IC using a magnifying glass.
Confirm that no abnormality is found on the soldering
position and installation position of the parts around the
IC. If some abnormality is found, correct by resoldering.
NOTE
When the IC leads are bent during soldering and/or
repairing, do not repair the bending of leads. If the
bending of leads are repaired, the pattern may be
damaged. So, be always sure to replace the IC in this
case.
Solder
IC
Supply soldering
from upper position
to lower position
Soldering Iron
Fig. 3-6
3. Absorb the solder left on the lead using the Braided
Shield Wire. (Refer to Fig. 3-7.)
NOTE
Do not absorb the solder to excess.
Soldering Iron
IC
Braided Shield Wire
1-10
Fig. 3-7
A/C
A
ACC
AE
AFC
AFT
AFT DET
AGC
AMP
ANT
A.PB
APC
ASS’Y
AT
AUTO
A/V
B
BGP
BOT
BPF
BRAKE SOL
BUFF
B/W
C
C
CASE
CAP
CARR
CH
CLK
CLOCK (SY-SE)
COMB
CONV
CPM
CTL
CYL
CYL-M
CYL SENS
D
DATA (SY-CE)
dB
DC
DD Unit
DEMOD
DET
DEV
E
E
EF
EMPH
ENC
ENV
EOT
EQ
EXT
F
F
FBC
FE
FF
FG
FL SW
FM
FSC
FWD
G
GEN
GND
H
H.P.F
KEY TO ABBREVIATIONS
:
Audio/Control
:
Automatic Color Control
:
Audio Erase
:
Automatic Frequency Control
:
Automatic Fine Tuning
:
Automatic Fine Tuning Detect
:
Automatic Gain Control
:
Amplifier
:
Antenna
:
Audio Playback
:
Automatic Phase Control
:
Assembly
:
All Time
:
Automatic
:
Audio/Video
:
Burst Gate Pulse
:
Beginning of Tape
:
Bandpass Filter
:
Brake Solenoid
:
Buffer
:
Black and White
:
Capacitance, Collector
:
Cassette
:
Capstan
:
Carrier
:
Channel
:
Clock
:
Clock (Syscon to Servo)
:
Combination, Comb Filter
:
Converter
:
Capstan Motor
:
Control
:
Cylinder
:
Cylinder-Motor
:
Cylinder-Sensor
:
Data (Syscon to Servo)
:
Decibel
:
Direct Current
:
Direct Drive Motor Unit
:
Demodulator
:
Detector
:
Deviation
:
Emitter
:
Emitter Follower
:
Emphasis
:
Encoder
:
Envelope
:
End of Tape
:
Equalizer
:
External
:
Fuse
:
Feed Back Clamp
:
Full Erase
:
Fast Forward, Flipflop
:
Frequency Generator
:
Front Loading Switch
:
Frequency Modulation
:
Frequency Sub Carrier
:
Forward
:
Generator
:
Ground
:
High Pass Filter
H.SW
Hz
I
IC
IF
IND
INV
K
KIL
L
L
LED
LIMIT AMP
LM, LDM
LP
L.P.F
LUMI.
M
M
MAX
MINI
MIX
MM
MOD
MPX
MS SW
N
NC
NR
O
OSC
OPE
P
PB
PB CTL
PB-C
PB-Y
PCB
P. CON
PD
PG
P-P
R
R
REC
REC-C
REC-Y
REEL BRK
REEL S
REF
REG
REW
REV, RVS
RF
RMC
RY
S
S. CLK
S. COM
S. DATA
SEG
SEL
SENS
SER
SI
SIF
SO
SOL
SP
STB
SW
:
Head Switch
:
Hertz
:
Integrated Circuit
:
Intermediate Frequency
:
Indicator
:
Inverter
:
Killer
:
Left
:
Light Emitting Diode
:
Limiter Amplifier
:
Loading Motor
:
Long Play
:
Low Pass Filter
:
Luminance
:
Motor
:
Maximum
:
Minimum
:
Mixer, mixing
:
Monostable Multivibrator
:
Modulator, Modulation
:
Multiplexer, Multiplex
:
Mecha State Switch
:
Non Connection
:
Noise Reduction
:
Oscillator
:
Operation
:
Playback
:
Playback Control
:
Playback-Chrominance
:
Playback-Luminance
:
Printed Circuit Board
:
Power Control
:
Phase Detector
:
Pulse Generator
:
Peak-to Peak
:
Right
:
Recording
:
Recording-Chrominance
:
Recording-Luminance
:
Reel Brake
:
Reel Sensor
:
Reference
:
Regulated, Regulator
:
Rewind
:
Reverse
:
Radio Frequency
:
Remote Control
:
Relay
:
Serial Clock
:
Sensor Common
:
Serial Data
:
Segment
:
Select, Selector
:
Sensor
:
Search Mode
:
Serial Input
:
Sound Intermediate Frequency
:
Serial Output
:
Solenoid
:
Standard Play
:
Serial Strobe
:
Switch
1-11
S
SYNC
SYNC SEP
T
TR
TRAC
TRICK PB
TP
U
UNREG
V
V
VCO
VIF
VP
V.PB
VR
V.REC
VSF
VSR
VSS
V-SYNC
VT
X
X’TAL
Y
Y/C
KEY TO ABBREVIATIONS
:
Synchronization
:
Sync Separator, Separation
:
Transistor
:
Tracking
:
Trick Playback
:
Test Point
:
Unregulated
:
Volt
:
Voltage Controlled Oscillator
:
Video Intermediate Frequency
:
Vertical Pulse, Voltage Display
:
Video Playback
:
Variable Resistor
:
Video Recording
:
Visual Search Fast Forward
:
Visual Search Rewind
:
Voltage Super Source
:
Vertical-Synchronization
:
Voltage Tuning
:
Crystal
:
Luminance/Chrominance
1-12
SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.
To enter to the SERVICE MODE function, press and hold both buttons simultaneously on the main unit or on the main unit and on
the remote control for more than a standard time (second).
Set Key
CH UP
CH UP STOP 2
CH UP PLAY 2
CH DOWN POWER 2
Set Key
REC 4 2
REC 6 2
STOP 1 3
Set Key
FF 2
Standard Time
(seconds)
Standard Time
(seconds)
Operations
PLAY/REC total hours are displayed on the FIP.
Refer to the “PREVENTIVE CHECKS AND SERVICE INTERVALS”
(CONFIRMATION OF HOURS USED).
Can be checked of the INITIAL DATA of MEMORY IC.
Refer to the “WHEN REPLACING EEPROM (MEMORY) IC”.
Adjust the SWITHCHING POINT automatically.
Refer to the “ELECTRICAL ADJUSTMENT” (SWITHCHING POINT).
Initialization of the factory on VCR.
NOTE:
VCR operation mode at no connection of DVD.
Refer to the “PREPARATION FOR SERVICING”
NOTE: Although the DVD is connected, the DVD mode cannot be selected.
Do not use this for the normal servicing.
If you set a factory initialization, the memories are reset such as
the clock setting, the channel setting, and PLAY/REC total hours.
OperationsRemocon Key
Initialization of the factory on DVD.
NOTE:
DVD Write mode.
Refer to the “RE-WRITE FOR DVD FIRMWARE”.
NOTE:
Check for the firmware version.
Refer to the “RE-WRITE FOR DVD FIRMWARE”.
NOTE:
The function will only work without the setting of DVD disc at DVD
mode.
Do not use this for the normal servicing.
The function will only work at the DVD stop mode.
Do not use this for the normal servicing.
The function will only work at the DVD stop mode.
Do not use this for the normal servicing.
<NOTE> WHEN "N" IS ALWAYS BEING DISPLAYED ON THE TV MONITOR.
(REMOTE CONTROLLER FORMAT)
This product is usable the remote controller which is used by DVD+VHS of the other brand.
If "N" is always being displayed on the TV monitor, can not control from provided remote controller since this product is other
brand format.
• How to return a JVC format.
Turn off the power of the set and push the CHANNEL+ button and the REC button of the set simultaneously.
PARENTAL CONTROL - RATING LEVEL
4-DIGIT SECURITY CODE CANCELLATION
If the stored 4-digit security code in the Rating Level menu needs to be cancelled, please follow the steps below.
Turn on the power, and set to the DVD stop mode.
1.
Press the SET UP button to display the DVD menu.
2.
Press the SET +/- button to select the "Operation" menu.
3.
Press the TV/VCR PR +/- button to select the Parental Lock, then press the OK button.
4.
Press the TV/VCR PR +/- button to select the ON or OFF, then press the OK button.
5.
Press the STOP button four times on the remote control, then press the OK button.
6.
The 4-digit security code is cleared.
Press the SET UP button to disappear the DVD menu.
7.
1-13
WHEN REPLACING EEPROM (MEMORY) IC
If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to
ensure correct data settings while making reference to TABLE 1.
INI
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
B0
--- --- --- --- --- --- --- --- --- 8B C9 D2 71 62 76 04
C0
B2 17 90 50 60 FA 54 51 51 51 B2 9F
D0
DB 61 21 08 02 FF 00 00 79 9F 82 02 42 B5 63 5B
E0
76 5F 08 F0 0A FB 5F 08 F0 05 F2 5F 09 F0 05 F3
F0
01 2F 9F 42 42 80 3D 06 06 89 00 3A D0 --- --- ---
1.
Turn on the POWER.
2.
Press both CH UP button on the set and the FF button on the set for more than 2 seconds.
ADDRESS and DATA will appear on FIP as Fig 1.
3.
ADDRESS is now selected and should “blink”. Using the SET + or - button on the remote,
step through the ADDRESS until required ADDRESS to be changed is reached.
4.
Press OK to select DATA. When DATA is selected, it will “blink”.
5.
Again, step through the DATA using SET + or - button until required DATA value has been selected.
6.
Pressing OK will take you back to ADDRESS for further selection if necessary.
7.
Repeat steps 3 to 6 until all data has been checked.
8.
When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
After the data input, set to the initializing of shipping.
9.
Turn POWER on.
10.
Press both CH UP button on the set and the STOP button on the set for more than 2 seconds.
11.
After the finishing of the initializing of shipping, the unit will turn off automatically.
The unit will now have the correct DATA for the new MEMORY IC.
Table 1
8E 00 66
97
NOTE:
No need setting for
after INI FD.
ADDRESS DATA
Fig. 1
1-14
PREVENTIVE CHECKS AND SERVICE INTERVALS
The following standard table depends on environmental conditions and usage.
Parts replacing time does not mean the life span for individual parts.
Also, long term storage or misuse may cause transformation and aging of rubber parts.
The following list means standard hours, so the checking hours depends on the conditions.
Time
Parts Name
Audio Control Head
Full Erase Head
(Recorder only)
Capstan Belt
Pinch Roller
Capstan DD Unit
Loading Motor
Tension Band
T Brake Band
Clutch Ass’y
Idler Arm Ass’y
Capstan Shaft
Tape Running
Guide Post
Cylinder Unit
500
hours
1,000
hours
1,500
hours
2,000
hours
2,500
hours
CONFIRMATION OF HOURS USED
PLAY/REC total hours can be checked on the FIP.
Total hours are displayed in 16 system of notation.
NOTE: If you set a factory initialization, the total hours is
reset to “0”.
1.
Turn on the POWER.
2.
While pressing the CH UP button on the set, press the FF button on the set for
more than 2 seconds.
3.
Adjust the ADDRESS to "FD" by SET + or - button and read the DATA.
(This DATA becomes the thousands digit and hundreds digit value of the following
formula.)
4.
Adjust the ADDRESS to "FE" by SET + or - button and read the DATA.
(This DATA becomes the tens digit and ones digit value of the following formula.)
5.
After the confirmation of using hours, turn off the power.
CLEANING
NOTE
After cleaning the heads with isopropyl alcohol, do not
run a tape until the heads dry completely. If the heads are
not completely dry and alcohol gets on the tape, damage
may occur.
1. AUDIO CONTROL HEAD
Clean the Audio Control Head with the cotton stick
soaked by alcohol. Clean the full erase head in the same
manner. (Refer to the figure below.)
2. TAPE RUNNING SYSTEM
When cleaning the tape transport system, use the gauze
moistened with isopropyl alcohol.
3. CYLINDER
Wrap a piece of chamois around your finger. Dip it in
isopropyl alcohol. Hold it to the cylinder head softly.
Turn the cylinder head counterclockwise to clean it (in the
direction of the arrow). (Refer to the figure below.)
NOTE
Do not exert force against the cylinder head. Do not move
the chamois upward or downward on the head.
Use the chamois one by one.
Notes
Clean those parts in
contact with the tape.
Clean the rubber, and parts
which the rubber touches.
Replace when rolling
becomes abnormal.
Clean the Head
ADDRESS DATA
PLAY/REC total hours.
= (16 x 16 x 16 x thousands digit value)
+ (16 x 16 x hundreds digit value)
+ (16 x tens digit value)
+ (ones digit value)
: Clean
: Check it and if
necessary, replace it.
Audio Control Head
Cylinder Head
1-15
SERVICING FIXTURES AND TOOLS
(4 heads model)
VHS Alignment T ape
MHP
Torque Tape Short Jumper
Torque Gauge
PUJ48075-2
MECHANISM ADJUSTMENT PARTS LOCATION GUIDE
Roller Driver
PTU94002-2
X-JG153 X Value Adjustment
Screwdriver
4
5
6
3
2
1
10
Tension Connect
1.
T ension Arm
2.
Guide Roller
3.
Audio/Control Head
4.
X value adjustment driver hole
5.
P4 Post
6.
T Brake Spring
7.
T Reel
8.
S Reel
9.
Adjusting section for the Tension Arm position
10.
89
7
1-16
MECHANICAL ADJUSTMENTS
TAPE REMOVAL METHOD AT NO POWER SUPPLY
1.
Remove the Top Cabinet, Front Cabinet and DVD Block.
(Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)
2.
Remove the screw 1 of the Deck Chassis and remove the
Loading Motor. (Refer to Fig. 2)
3.
Rotate the Pinch Roller Cam in the direction of the arrow by
hand to slacken the Video Tape.
4.
Rotate the Clutch Ass'y either of the derections to wind the
Video Tape in the Cassette Case.
5.
Repeat the above step 3~4. Then take out the Video
Cassette from the Deck Chassis.
Be careful not to scratch on the tape.
Loading Motor
Screw 1
Capstan DD Unit
Pinch Roller Cam
Main Cam
Main Chassis (Front Side)
Clutch Ass'y
1. CONFIRMATION AND ADJUSTMENT
Read the following NOTES before starting work.
• Place an object which weighs between 450g~500g on the
Cassette Tape to keep it steady when you want to make
the tape run without the Cassette Holder. (Do not place
an object which weighs over 500g.)
1-1: CONFIRMATION AND ADJUSTMENT OF TENSION
POST POSITION
1.
Set to the PLAY mode.
2.
Adjust the adjusting section for the Tension Arm position
so that the Tension Arm top is within the standard line of
Main Chassis.
3.
While turning the S Reel clockwise, confirm that the edge
of the Tension Arm is located in the position described
above.
Standard line of Main Chassis
Tension Arm
0.5mm (Adjusting range)
Adjusting section for the
Tension Arm position
Fig. 1-1-A
DISC REMOVAL METHOD AT NO POWER SUPPLY
1.
Remove the Top Cabinet and Front Cabinet. (Refer to item
1 of the DISASSEMBLY INSTRUCTIONS.)
2.
Rotate the gear of Deck CD section in the direction of the
arrow by hand, remove the disc from Deck CD.
Gear
Deck CD
Tension Band
The Tension Arm top will
move to the inside direction
of the Main Chassis.
Bend
The Tension Arm top will
move to the outside direction
of the Main Chassis.
Fig. 1-1-B
1-2: CONFIRMATION OF PLAYBACK TORQUE AND
BACK TENSION TORQUE DURING PLAYBACK
1.
After confirmation and adjustment of Tension Post
position (Refer to item 1-1), load the cassette type
torque tape and set to the PLAY mode.
2.
Confirm that the right meter of the torque tape indicates
50~90gf•cm during playback in SP mode.
3.
Confirm that the left meter of the torque tape indicates
25~40gf•cm during playback in SP mode.
1-3: CONFIRMATION OF VSR TORQUE
1.2.Install the Torque Gauge on the S Reel. Set to the Picture
Search (Rewind) mode. (Refer to Fig.1-2-B)
Then, confirm that it indicates 120~180gf•cm.
NOTE
Install the Torque Gauge on the reel disk firmly. Press the
REW button to turn the reel disk.
1-17
MECHANICAL ADJUSTMENTS
1-4: CONFIRMATION OF REEL BRAKE TORQUE
(S Reel Brake) (Refer to Fig. 1-2-B)
1.
Once set to the Fast Forward mode then set to the Stop
mode. While, unplug the AC cord when the Pinch Roller
Block is on the position of Fig. 1-2-A.
2.
Move the Idler Ass’y from the S Reel.
3.
Install the Torque Gauge on the S Reel. Turn the Torque
Gauge clockwise.
4.
Then, confirm that it indicates 60~100gf•cm.
(T Reel Brake) (Refer to Fig. 1-2-B)
1.
Once set to the Fast Forward mode then set to the Stop
mode. While, unplug the AC cord when the Pinch Roller
Block is on the position of Fig. 1-2-A.
2.
Move the Idler Ass’y from the T Reel.
3.
Install the Torque Gauge on the T reel. Turn the Torque
Gauge counterclockwise.
4.
Then, confirm that it indicates 30~50gf•cm.
The position at FF mode.
Pinch Roller Block
Stop at this position.
The position at
STOP mode.
Capstan DD Unit
Cassette Holder Ass’y
Cassette Opener
Fig. 1-2-A
2. CONFIRMATION AND ADJUSTMENT OF TAPE RUNNING MECHANISM
Tape Running Mechanism is adjusted precisely at the
factory. Adjustment is not necessary as usual. When you
replace the parts of the tape running mechanism because of
long term usage or failure, the confirmation and adjustment
are necessary.
2-1: GUIDE ROLLER
1.
Playback the VHS Alignment Tape (MHP).
2.
Connect CH-1 of the oscilloscope to TP102 (Envelope)
and CH-2 to TP101 (SW Pulse).
3.
Press and hold the Tracking-Auto button on the remote
control more than 2 seconds to set tracking to center.
4.
Trigger with SW Pulse and observe the envelope. (Refer
to Fig. 2-1-A)
5.
When observing the envelope, adjust the Roller Driver
(PTU94002-2) slightly until the envelope will be flat.
Even if you press the Tracking Button, adjust so that
flatness is not moved so much. (Refer to Fig. 2-1-B)
6.
Adjust so that the A : B ratio is better than 3 : 2 as shown
in Fig. 2-1-C, even if you press the Tracking Button to
move the envelope (The envelope waveform will begin to
decrease when you press the Tracking Button).
7.
Adjust the PG shifter during playback.
(Refer to the ELECTRICAL ADJUSTMENTS)
NOTE
After adjustment, confirm and adjust A/C head.
(Refer to item 2-2)
Torque Gauge
Torque Gauge
S Reel
T Reel
Fig. 1-2-B
NOTE
If the torque is out of the range, replace the following parts.
Check item
1-3
1-4
S Reel side:
Replacement Part
Idler Ass’y/Clutch Ass’y
S Reel/Tension Band/Tension
Connect/T ension Arm Ass’y
T Reel side:
T Reel/T Brake Band//T Brake
Spring/T Brake Arm
CH-1
Envelope
(TP102)
CH-2
SW Pulse (TP101)
Improper
(a) Guide roller
(b) P4 Cap
Entrance
Max
A B
CH-1
CH-2
Track
Track
A : B ≥ 3 : 2
Fig. 2-1-A
Proper
Fig. 2-1-B
Exit
Max
Fig. 2-1-C
1-18
Play MHP
Drum side Control head position Capstan side
X-value adjustment point
Maximum
Waveform output
MECHANICAL ADJUSTMENTS
2-2: CONFIRMATION AND ADJUSTMENT OF AUDIO/
CONTROL HEAD
When the Tape Running Mechanism does not work well,
adjust the following items.
1.
Playback the VHS Alignment Tape (MHP).
2.
Confirm that the reflected picture of stamp mark is
appeared on the tape prior to P4 Post as shown in Fig. 2-
2-A.
a)
When the reflected picture is distorted, turn the screw
1 clockwise until the distortion is disappeared.
b)
When the reflected picture is not distorted, turn the
screw 1 counterclockwise until little distortion is
appeared, then adjust the a).
3.
Turn the screw 2 to set the audio level to maximum.
4.
Confirm that the bottom of the Audio/ Control Head and
the bottom of the tape is shown in Fig. 2-2-C.
c)
When the height is not correct, turn the screw 3 to
adjust the height. Then, adjust the 1~3 again.
Audio/Control Head
Reflected picture of
Stamp Mark
P4 Cap
2-3: TAPE RUNNING ADJUSTMENT
(X VALUE ADJUSTMENT)
1.
Confirm and adjust the position of the Tension Post.
(Refer to item 1-1)
2.
Adjust the Guide Roller. (Refer to item 2-1)
3.
Confirm and adjust the Audio/Control Head.
(Refer to item 2-2)
4.
Connect CH-1 of the oscilloscope to TP101, CH-2 to
TP102 and CH-3 to Audio Out.
5.
Playback the VHS Alignment Tape (MHP).
6.
Press and hold the Tracking-Auto button on the remote
control more than 2 seconds to set tracking to center.
7.
Set the X Value adjustment driver (X-JG153) to the 4 of
Fig. 2-2-B. At first, turn the Audio/Control Head position
fully toward the capstan side. Then adjust X Value to turn
it back gradually toward the cylinder side and stop on the
second peak point position of the envelope.
Audio/Control Head
3
2
Audio/Control Head
Tape
Stamp Mark
1
4
Fig. 2-2-A
Fig. 2-2-B
0.25±0.05mm
Fig. 2-2-C
8.
Perform tracking operation and confirm the envelope is
maximum on the tracking center position.
9.
Playback the VHS Alignment Tape (MHP-L).
10.
Perform tracking operation and confirm the envelope is
maximum on the tracking center position. If envelope is
not maximum, should be fine-tune the X-VALUE.
Fig. 2-3
1-19
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